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game/client/NextBot/C_NextBot.cpp

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+// C_NextBot.cpp
+// Client-side implementation of Next generation bot system
+// Author: Michael Booth, April 2005
+// Copyright (c) 2005 Turtle Rock Studios, Inc. - All Rights Reserved
+
+#include "cbase.h"
+#include "C_NextBot.h"
+#include "debugoverlay_shared.h"
+#include <bitbuf.h>
+#include "viewrender.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+#undef NextBot
+
+ConVar NextBotShadowDist( "nb_shadow_dist", "400" );
+
+//-----------------------------------------------------------------------------
+IMPLEMENT_CLIENTCLASS_DT( C_NextBotCombatCharacter, DT_NextBot, NextBotCombatCharacter )
+END_RECV_TABLE()
+
+
+//-----------------------------------------------------------------------------
+C_NextBotCombatCharacter::C_NextBotCombatCharacter()
+{
+	// Left4Dead have surfaces too steep for IK to work properly
+	m_EntClientFlags |= ENTCLIENTFLAG_DONTUSEIK;
+
+	m_shadowType = SHADOWS_SIMPLE;
+	m_forcedShadowType = SHADOWS_NONE;
+	m_bForceShadowType = false;
+
+	TheClientNextBots().Register( this );
+}
+
+
+//-----------------------------------------------------------------------------
+C_NextBotCombatCharacter::~C_NextBotCombatCharacter()
+{
+	TheClientNextBots().UnRegister( this );
+}
+
+
+//-----------------------------------------------------------------------------
+void C_NextBotCombatCharacter::Spawn( void )
+{
+	BaseClass::Spawn();
+}
+
+
+//-----------------------------------------------------------------------------
+void C_NextBotCombatCharacter::UpdateClientSideAnimation()
+{
+	if (IsDormant())
+	{
+		return;
+	}
+
+	BaseClass::UpdateClientSideAnimation();
+}
+
+
+//--------------------------------------------------------------------------------------------------------
+void C_NextBotCombatCharacter::UpdateShadowLOD( void )
+{
+	ShadowType_t oldShadowType = m_shadowType;
+
+	if ( m_bForceShadowType )
+	{
+		m_shadowType = m_forcedShadowType;
+	}
+	else
+	{
+#ifdef NEED_SPLITSCREEN_INTEGRATION
+		FOR_EACH_VALID_SPLITSCREEN_PLAYER( hh )
+		{
+			C_BasePlayer *pl = C_BasePlayer::GetLocalPlayer(hh);
+			if ( pl )
+			{
+				Vector delta = GetAbsOrigin() - C_BasePlayer::GetLocalPlayer(hh)->GetAbsOrigin();
+#else
+		{
+			if ( C_BasePlayer::GetLocalPlayer() )
+			{
+				Vector delta = GetAbsOrigin() - C_BasePlayer::GetLocalPlayer()->GetAbsOrigin();
+#endif
+				if ( delta.IsLengthLessThan( NextBotShadowDist.GetFloat() ) )
+				{
+					m_shadowType = SHADOWS_RENDER_TO_TEXTURE_DYNAMIC;
+				}
+				else
+				{
+					m_shadowType = SHADOWS_SIMPLE;
+				}
+			}
+			else
+			{
+				m_shadowType = SHADOWS_SIMPLE;
+			}
+		}
+	}
+
+	if ( oldShadowType != m_shadowType )
+	{
+		DestroyShadow();
+	}
+}
+
+
+//--------------------------------------------------------------------------------------------------------
+ShadowType_t C_NextBotCombatCharacter::ShadowCastType( void ) 
+{
+	if ( !IsVisible() )
+		return SHADOWS_NONE;
+
+	if ( m_shadowTimer.IsElapsed() )
+	{
+		m_shadowTimer.Start( 0.15f );
+		UpdateShadowLOD();
+	}
+
+	return m_shadowType;
+}
+
+
+//--------------------------------------------------------------------------------------------------------
+bool C_NextBotCombatCharacter::GetForcedShadowCastType( ShadowType_t* pForcedShadowType ) const
+{
+	if ( pForcedShadowType )
+	{
+		*pForcedShadowType = m_forcedShadowType;
+	}
+	return m_bForceShadowType;
+}
+
+//--------------------------------------------------------------------------------------------------------
+/**
+ * Singleton accessor.
+ * By returning a reference, we guarantee construction of the 
+ * instance before its first use.
+ */
+C_NextBotManager &TheClientNextBots( void )
+{
+	static C_NextBotManager manager;
+	return manager;
+}
+
+
+//--------------------------------------------------------------------------------------------------------
+C_NextBotManager::C_NextBotManager( void )
+{
+}
+
+
+//--------------------------------------------------------------------------------------------------------
+C_NextBotManager::~C_NextBotManager()
+{
+}
+
+
+//--------------------------------------------------------------------------------------------------------
+void C_NextBotManager::Register( C_NextBotCombatCharacter *bot )
+{
+	m_botList.AddToTail( bot );
+}
+
+
+//--------------------------------------------------------------------------------------------------------
+void C_NextBotManager::UnRegister( C_NextBotCombatCharacter *bot )
+{
+	m_botList.FindAndRemove( bot );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose:
+//-----------------------------------------------------------------------------
+bool C_NextBotManager::SetupInFrustumData( void )
+{
+#ifdef ENABLE_AFTER_INTEGRATION
+	// Done already this frame.
+	if ( IsInFrustumDataValid() )
+		return true;
+
+	// Can we use the view data yet?
+	if ( !FrustumCache()->IsValid() )
+		return false;
+
+	// Get the number of active bots.
+	int nBotCount = m_botList.Count();
+
+	// Reset.
+	for ( int iBot = 0; iBot < nBotCount; ++iBot )
+	{
+		// Get the current bot.
+		C_NextBotCombatCharacter *pBot = m_botList[iBot];
+		if ( !pBot )
+			continue;
+
+		pBot->InitFrustumData();
+	}
+
+	FOR_EACH_VALID_SPLITSCREEN_PLAYER( iSlot )
+	{
+		ACTIVE_SPLITSCREEN_PLAYER_GUARD( iSlot );
+		// Get the active local player.
+		C_BasePlayer *pPlayer = C_BasePlayer::GetLocalPlayer();
+		if ( !pPlayer )
+			continue;
+
+		for ( int iBot = 0; iBot < nBotCount; ++iBot )
+		{
+			// Get the current bot.
+			C_NextBotCombatCharacter *pBot = m_botList[iBot];
+			if ( !pBot )
+				continue;
+
+			// Are we in the view frustum?
+			Vector vecMin, vecMax;
+			pBot->CollisionProp()->WorldSpaceAABB( &vecMin, &vecMax );
+			bool bInFrustum = !FrustumCache()->m_Frustums[iSlot].CullBox( vecMin, vecMax );
+		
+			if ( bInFrustum )
+			{
+				Vector vecSegment;
+				VectorSubtract( pBot->GetAbsOrigin(), pPlayer->GetAbsOrigin(), vecSegment );
+				float flDistance = vecSegment.LengthSqr();
+				if ( flDistance < pBot->GetInFrustumDistanceSqr() )
+				{
+					pBot->SetInFrustumDistanceSqr( flDistance );
+				}	
+
+				pBot->SetInFrustum( true );
+			}
+		}
+	}
+
+	// Mark as setup this frame.
+	m_nInFrustumFrame = gpGlobals->framecount;
+#endif
+
+	return true;
+}
+
+//--------------------------------------------------------------------------------------------------------

game/client/NextBot/C_NextBot.h

@@ -0,0 +1,134 @@
+// C_NextBot.h
+// Next generation bot system
+// Author: Michael Booth, April 2005
+// Copyright (c) 2005 Turtle Rock Studios, Inc. - All Rights Reserved
+
+#ifndef _C_NEXT_BOT_H_
+#define _C_NEXT_BOT_H_
+
+#include "c_ai_basenpc.h"
+
+//----------------------------------------------------------------------------------------------------------------
+/**
+* The interface holding IBody information
+*/
+class IBodyClient
+{
+public:
+	enum ActivityType 
+	{ 
+		MOTION_CONTROLLED_XY	= 0x0001,	// XY position and orientation of the bot is driven by the animation.
+		MOTION_CONTROLLED_Z		= 0x0002,	// Z position of the bot is driven by the animation.
+		ACTIVITY_UNINTERRUPTIBLE= 0x0004,	// activity can't be changed until animation finishes
+		ACTIVITY_TRANSITORY		= 0x0008,	// a short animation that takes over from the underlying animation momentarily, resuming it upon completion
+		ENTINDEX_PLAYBACK_RATE	= 0x0010,	// played back at different rates based on entindex
+	};
+};
+
+
+//--------------------------------------------------------------------------------------------------------
+/**
+ * The client-side implementation of the NextBot
+ */
+class C_NextBotCombatCharacter : public C_BaseCombatCharacter
+{
+public:
+	DECLARE_CLASS( C_NextBotCombatCharacter, C_BaseCombatCharacter );
+	DECLARE_CLIENTCLASS();
+
+	C_NextBotCombatCharacter();
+	virtual ~C_NextBotCombatCharacter();
+
+public:	
+	virtual void Spawn( void );
+	virtual void UpdateClientSideAnimation( void );
+	virtual ShadowType_t ShadowCastType( void );
+	virtual bool IsNextBot() { return true; }
+	void ForceShadowCastType( bool bForce, ShadowType_t forcedShadowType = SHADOWS_NONE ) { m_bForceShadowType = bForce; m_forcedShadowType = forcedShadowType; }
+	bool GetForcedShadowCastType( ShadowType_t* pForcedShadowType ) const;
+
+	// Local In View Data.
+	void InitFrustumData( void )						{ m_bInFrustum = false; m_flFrustumDistanceSqr = FLT_MAX; m_nInFrustumFrame = gpGlobals->framecount; }
+	bool IsInFrustumValid( void )						{ return ( m_nInFrustumFrame == gpGlobals->framecount ); }
+	void SetInFrustum( bool bInFrustum )				{ m_bInFrustum = bInFrustum; }
+	bool IsInFrustum( void )							{ return m_bInFrustum; }
+	void SetInFrustumDistanceSqr( float flDistance )	{ m_flFrustumDistanceSqr = flDistance; }
+	float GetInFrustumDistanceSqr( void )				{ return m_flFrustumDistanceSqr; }
+
+private:
+	ShadowType_t	m_shadowType;			// Are we LOD'd to simple shadows?
+	CountdownTimer m_shadowTimer;	// Timer to throttle checks for shadow LOD
+	ShadowType_t	m_forcedShadowType;
+	bool			m_bForceShadowType;
+	void UpdateShadowLOD( void );
+
+	// Local In View Data.
+	int			m_nInFrustumFrame;
+	bool		m_bInFrustum;
+	float		m_flFrustumDistanceSqr;
+
+private:
+	C_NextBotCombatCharacter( const C_NextBotCombatCharacter & );				// not defined, not accessible
+};
+
+//--------------------------------------------------------------------------------------------------------
+/**
+ * The C_NextBotManager manager 
+ */
+class C_NextBotManager
+{
+public:
+	C_NextBotManager( void );
+	~C_NextBotManager();
+
+	/**
+	 * Execute functor for each NextBot in the system.
+	 * If a functor returns false, stop iteration early
+	 * and return false.
+	 */	
+	template < typename Functor >
+	bool ForEachCombatCharacter( Functor &func )
+	{
+		for( int i=0; i < m_botList.Count(); ++i )
+		{
+			C_NextBotCombatCharacter *character = m_botList[i];
+			if ( character->IsPlayer() )
+			{
+				continue;
+			}
+
+			if ( character->IsDormant() )
+			{
+				continue;
+			}
+
+			if ( !func( character ) )
+			{
+				return false;
+			}
+		}
+
+		return true;
+	}
+
+	int	 GetActiveCount()						    { return m_botList.Count(); }
+
+	bool SetupInFrustumData( void );
+	bool IsInFrustumDataValid( void )				{ return ( m_nInFrustumFrame == gpGlobals->framecount ); }
+
+private:
+	friend class C_NextBotCombatCharacter;
+
+	void Register( C_NextBotCombatCharacter *bot );
+	void UnRegister( C_NextBotCombatCharacter *bot );
+
+	CUtlVector< C_NextBotCombatCharacter * > m_botList;				///< list of all active NextBots
+
+	int	m_nInFrustumFrame;
+};
+
+// singleton accessor
+extern C_NextBotManager &TheClientNextBots( void );
+
+
+#endif // _C_NEXT_BOT_H_